67055661 has 8 divisors (see below), whose sum is σ = 99341760. Its totient is φ = 44703756.

The previous prime is 67055647. The next prime is 67055663. The reversal of 67055661 is 16655076.

It is a happy number.

It is not a de Polignac number, because 67055661 - 2⁵ = 67055629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67055663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241745 + ... + 1241798.

It is an arithmetic number, because the mean of its divisors is an integer number (12417720).

Almost surely, 2^67055661 is an apocalyptic number.

It is an amenable number.

67055661 is a deficient number, since it is larger than the sum of its proper divisors (32286099).

67055661 is a wasteful number, since it uses less digits than its factorization.

67055661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483552 (or 2483546 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 67055661 is about 8188.7521027321. The cubic root of 67055661 is about 406.2672514646.

The spelling of 67055661 in words is "sixty-seven million, fifty-five thousand, six hundred sixty-one".